[1.16.4]When "push item to vector" is used to add elements through variables, the content is overridden. Not increase

[Gan-N]

Issue description:
When "push item to vector" is used to add elements through variables, the content is overridden. Not increase
"Push integer to vector" is the same problem
Txt is the program I use

Steps to reproduce:
Untitled-1.txt

Versions:

• Minecraft: 1.16.4
• Forge: 35.1.36
• CompatLayer (only if on Minecraft 1.10 or 1.11):
• McJtyLib: 1.16-5.0.15
• RFTools:
• 1. rftoolsutility-1.16-3.0.20
• 2. rftoolsbase-1.16-2.0.9
• 3. rftoolsbuilder-1.16-3.0.13
• RFTools Control: 1.16-4.0.6

Possibly incompatible mods and versions:

Relevant logs, if any: